Sublimation:<\/h3>\n\n\n\n
Sublimation is the process by which a substance changes directly from a solid to a gas, skipping the liquid phase entirely. It occurs when the molecules in a solid gain enough energy to overcome the forces that hold them together, transitioning into the gas phase. A common example is iodine crystals, which directly sublimate into iodine gas when heated. In this case, the solid iodine turns into a violet vapor. Sublimation is a physical change because the chemical composition of the substance does not change; iodine remains iodine whether it’s in its solid or gaseous form.<\/p>\n\n\n\n
Heterogeneous Mixture and Pure Substance:<\/h3>\n\n\n\n
A heterogeneous mixture contains more than one phase or component that can be visually distinguished. However, it is possible for a heterogeneous mixture to contain only one pure substance if the components are not chemically combined but are merely physically mixed. For example, a mixture of sand and iron filings may look heterogeneous, but each component is still a pure substance (sand is SiO2, and iron is Fe). In this case, the components can be separated without altering their chemical structures.<\/p>\n\n\n\n
Homogeneous Mixture of Two Different Compounds:<\/h3>\n\n\n\n
A homogeneous mixture of two different compounds refers to a mixture where the components are uniformly distributed at a molecular or ionic level. An example would be a solution of salt (NaCl) dissolved in water. Here, water (H2O) and salt (NaCl) are chemically distinct compounds, but they form a single, uniform mixture. The salt dissolves into its constituent ions (Na+ and Cl-) and is distributed evenly throughout the water, making the mixture appear uniform even though two different compounds are present.<\/p>\n\n\n\n Iodine crystals sublime. Describe what sublimation means. Is sublimation a physical or chemical change? 7. Explain how it is possible to have a heterogeneous mixture and still have only one pure substance present. Give an example. 8. Explain how it is possible to have a homogeneous mixture of two different compounds. Give an example. The […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-42169","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/42169","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/comments?post=42169"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/42169\/revisions"}],"predecessor-version":[{"id":42171,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/42169\/revisions\/42171"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=42169"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=42169"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=42169"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"\"](\"https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-1402.jpeg\")
<\/figure>\n","protected":false},"excerpt":{"rendered":"